Filters
US4373635A · kind A · utility
35Cited by
3References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1981 |
| Grant date | Feb 15, 1983 |
| Priority date | — |
| Expiry date | Sep 30, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/48
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A replaceable filter cartridge has a pleated paper filter medium mounted within a frame or casing having a closed side and an open side, the open side being covered by a removable protective tray or lid the internal shape of which has been used in manufacture for moulding a sealing surface onto the periphery of the frame or casing, the closed side of the frame or casing being provided with a perforated portion which is also removable for use of the filter cartridge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.